AIRLESS TIRE

摘要

An airless tire includes a tread ring, a hub formed on radial direction inner side of the ring to be fixed to an axle, and a spoke structure connecting the ring and hub. The ring includes a tread rubber layer, a first reinforcing cord layer, a second reinforcing cord layer and a shear rubber layer between the first and second cord layers, the first and second cord layers and shear layer are formed such that ratio Eb1/Ee between tire circumferential direction tensile modulus Eb1 of the first cord layer and shear modulus Ee of the shear layer is 100 or greater and that ratio Eb2/Ee between tire circumferential direction tensile modulus Eb2 of the second cord layer and shear modulus Ee is 100 or greater, and each cord layer has a topping rubber having loss tangent tan δb of 0.03 to 0.10 and tensile modulus E*b of 4 to 20 MPa.

主权项

1. An airless tire, comprising:
a tread ring having a cylindrical form and a ground contact surface; a hub formed on a radial direction inner side of the tread ring and configured to be fixed to an axle; and a spoke structure connecting the tread ring and the hub, wherein the tread ring comprises a tread rubber layer having the ground contact surface, a first reinforcing cord layer formed closest to the tread rubber layer, a second reinforcing cord layer formed on a radial direction inner side of the first reinforcing cord layer, and a shear rubber layer formed between the first and second reinforcing cord layers, the first and second reinforcing cord layers and the shear rubber layer are formed such that a ratio Eb1/Ee between a tire circumferential direction tensile modulus Eb1 of the first reinforcing cord layer and a shear modulus Ee of the shear rubber layer is 100 or greater and that a ratio Eb2/Ee between a tire circumferential direction tensile modulus Eb2 of the second reinforcing cord layer and the shear modulus Ee of the shear rubber layer is 100 or greater, and each of the first and second reinforcing cord layers has a topping rubber having a loss tangent tan δb in a range of 0.03 to 0.10 and a tensile modulus E*b in a range of 4 to 20 MPa.